Dunn
Free invoice tools: due dates from payment terms, late fees, days late, payment reminder emails.
What it does
Dunn is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
From the publisher's description, Electra Index matched it to 2 capabilities: invoicing and payments. That makes it a candidate for tasks such as detect fraudulent transactions or send and chase invoices.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 3h ago (live check)Hosted endpoint
https://getdunn.org/mcpstreamable-http
In Claude Code: claude mcp add --transport http dunn https://getdunn.org/mcp
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"dunn": {
"url": "https://getdunn.org/mcp"
}
}
}Live check
Electra Index connected to the hosted endpoint 3h agoONLINE Dunn answered an MCP connection on 03 Nov 2026 and introduced itself as Dunn 1.0.0 (MCP protocol 2025-06-18).
4 tools offered to AI assistants
invoice_due_date· Exact due date for an invoice from its date and payment terms ("net 30", "due on receipt", "EOM", "net 30 EOM", "2/10 net 30"), including any early-payment discount date.late_fee_calculator· Works out a late fee: the amount, the new total, the exact day it applies, a ready-to-use line for the invoice, and whether the fee is in the usual range.how_late_is_this_invoice· How many days late an invoice is (or until it is due), and what to send the client now and next, following a proven reminder schedule.payment_reminder_email· Writes the right payment reminder for where the invoice is now (before due, due today, late, or a final notice), with subject line. Polite by default; firm on request.
What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method
Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.
Tasks it helps with
Share of each task's required capabilities it covers| Detect fraudulent transactions Payments | 50% |
| Send and chase invoices Invoicing | 50% |
| Buy products online Payments | 33% |
| Handle refund requests Payments | 33% |
| Reconcile payments Payments | 33% |
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- Teachworks MCP by usefulapiREMOTELOCALRead Teachworks students, families, tutors, lessons, invoices and payments; book lessons
Ready-made AI agents
- Digits86$65/mo · Prices & score →
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- Tipalti67$99/mo · Prices & score →
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Hosted endpoint | https://getdunn.org/mcp | DECLARED | SRC-001 Official MCP Registry | 3h ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 3h ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 3h ago |
| Website | https://getdunn.org/ai | DECLARED | SRC-001 Official MCP Registry | 3h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 3h ago |
| Version | 1.0.0 | DECLARED | SRC-001 Official MCP Registry | 3h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 3h ago |
Change history
- NEW03 Nov 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is Dunn still online?
Free alerts · no account▲ 0Do you run Dunn? Know when it stops answering
For publishers · optionalIts hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.
Monitoring never changes a score or a rank.
Are you the publisher of Dunn?
Free · show your listingAn independent listing builds trust with your buyers. Announce it, and add the badge to your website or README.
<a href="https://electraindex.com/mcp/dunn?utm_source=badge&utm_medium=share&utm_campaign=listing"><img src="https://electraindex.com/api/badge/dunn" alt="Listed on Electra Index"></a>Questions about Dunn
How do I connect Dunn?
Use the hosted endpoint https://getdunn.org/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What tools does Dunn offer?
When Electra Index connected on 03 Nov 2026, it listed 4 tools: invoice_due_date, late_fee_calculator, how_late_is_this_invoice, payment_reminder_email. The full list is in "Live check" above.
Is Dunn online?
Yes. Its hosted endpoint answered an MCP connection from Electra Index 3h ago.
What can I use Dunn for?
Based on its description, it is most relevant to: detect fraudulent transactions, send and chase invoices, buy products online, handle refund requests.